Park-Zone provides a solution for parking in crowded garages or for people who have difficulty with depth perception. The product installs with just 4 screws (supplied). You park your vehicle in the desired location inside the garage, press the button on the top of the
unit and the system is ready. Park Zone will tell you when your vehicle is about 8 feet from the wall (yellow light), and when you reach the desired distance, the red light visually indicates that it's time to stop.